How to I rotate UIImageView by 90 degrees inside a UIScrollView with correct image size and scrolling?

Question

I have an image inside an UIImageView which is within a UIScrollView. What I want to do is rotate this image 90 degrees so that it is in landscape by default, and set the initi

Answer 1

There's a much easier solution that is also faster, just do this:

- (void) imageRotateTapped:(id)sender
{
    [UIView animateWithDuration:0.33f animations:^()
    {
        self.imageView.transform = CGAffineTransformMakeRotation(RADIANS(self.rotateDegrees += 90.0f));
        self.imageView.frame = self.imageView.superview.bounds; // change this to whatever rect you want
    }];
}

When the user is done, you will need to actually create a new rotated image, but that is very easy to do.